Black Guillemot

Cepphus grylle

27,934Records since 2000

MayPeak month

58Counties with records

Least ConcernIUCN Red List

When it is recorded

Jan1,069

Feb1,269

Mar1,596

Apr2,744

May4,664

Jun4,564

Jul3,651

Aug2,446

Sep2,012

Oct2,036

Nov781

Dec713

GBIF records by month, 2000–2025 (all years combined).

#	County	Nation	Records
1	Shetland Islands	—	6,136
2	Highland	Scotland	3,061
3	Orkney Islands	Scotland	2,141
4	Argyll and Bute	Scotland	2,132
5	South Ayrshire	Scotland	1,447
6	Na h-Eileanan Siar	Scotland	964
7	Causeway Coast and Glens	Northern Ireland	880
8	Belfast	Northern Ireland	794
9	Isle of Anglesey	Wales	520
10	North Ayrshire	Scotland	408
11	Dumfries and Galloway	Scotland	318
12	Gwynedd	Wales	219
13	Aberdeenshire	Scotland	218
14	Ards and North Down	Northern Ireland	204
15	Mid and East Antrim	Northern Ireland	187

807 England22,916 Scotland1,432 Wales2,602 Northern Ireland

Records per county (GADM level 2) and per nation; one record can count towards several areas. 58 counties in all.

Records since 2000: 27,934
Peak month: May
Counties with records: 58
IUCN Red List: Least Concern
Scientific name: Cepphus grylle
Group: Birds
NBN Atlas records since 2000: 5,446
Most recorded in: Shetland Islands, Highland, Orkney Islands, Argyll and Bute, South Ayrshire, Na h-Eileanan Siar, Causeway Coast and Glens, Belfast, Isle of Anglesey, North Ayrshire, Dumfries and Galloway, Gwynedd +13
Conservation designations: Birds of Conservation Concern, Convention on Migratory Species, GB Red List (2001 IUCN criteria)
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Alcidae
Genus: Cepphus
Name with authority: Cepphus grylle (Linnaeus, 1758)
Described: 1758
Contributing datasets: 19